Methods for accumulation of heavy metals, including chromium, through chemical modification of the yeast biomass

摘要

the application concerns the way the accumulation and recovery of heavy metals, especially chromium by chemical treatment of yeast biomass, which is carried out sorpcju0119 heavy metals from aqueous liquid phase using yeast biomass.separate yeast biomass containing zaadsorbowane heavy metals from aqueous phase liquid and processing of yeast biomass containing heavy metals to recover heavy metals, especially chromium, in the form of compounds of heavy metals and organic production item ostau0142ou015bci biomass essentially free of heavy metals.according to the way in successive stages: (a) the separated biomass distributed in the water, the strong principle, sufficient to maintain a ph of at least 12 and applying mechanical stimulation is heated up to the boiling temperature of the mixture, for a period of time sufficient to obtain solubilizacji biomass (b) solubilizat cools.ask the strong utleniaczem inorganic and heated up to the boiling temperature, for a period of time sufficient to oxidize the heavy metals contained in biomass, with oxidized solubilizat, (c) oxidized solubilizat cools to the ambient temperature, water roztwo asks rem mineral acid to ph 9 - 12 and oozes with the first sludgecontaining essentially hydroxides of heavy metals, such as cu, sn and zn, especially, first the filtrate, the filtrate is (d) the first aqueous mineral acid to ph 4 - 8 and oozes, obtaining a second precipitate containing essentially organic material and second the filtrate (e) the filtrate is concentrated and optionally second asks a water-soluble compound of ba (ii) and / or pb (ii),using the quantity of light of ba (ii) and / or pb (ii) corresponding to the content of chromium and oozes with the third sludge containing chromium in the form of insoluble compound chromianowego and third the filtrate essentially devoid of chromium.